Technical spec: Three phase A.C. Synchronous generators. Drip-proof with rotary field type and adopt harmonic excitation system, easy operation and maintenance. Under the following environment, the generator could run continuously: 1. Altitude: not exceed 1000m. 2. Ambient temperature: -15C~40C 3. Relative air humidity: not exceed 90%. Application: Widely used in town, countryside, worksites, mountains and pasture districts as electric power source for lighting. Also be used as reserved power source for emergency.